Question

pla ans this queation

Answer 1

1. 31 is the mass no.
2. 15 is the atomic no.
3. 2,8,5 is the electronic configuration

Answer 2

heya...!!!

✔here is ua answer:

31 is the mass number.

15 is the atomic number.

2,8,5 is the electronic configuration.

hope it helps..!!!❤